Initially it worked great; recognized immediately by my Droid Maxx 2, fast transfer times, etc. However, as of last night (just short of a month of use), it started doing the infamous 'random unmount' bug. I was playing music and it started to fail reading files, then after a few minutes and a few reboots/rescans it got to the point where it consistently unmounted within 30 seconds of a restart and I haven't gotten it to work since. Apparently SanDisk and PNY SD cards are both notorious for this issue in Android devices, as per researching the issue on the Android forums.